public class TS extends TT{
//    @Override
//    public void run() {
//        System.out.println("ts run");
//    }
}
class TT implements TTT{

    @Override
    public void run() {
        System.out.println("tt run");
    }

    public void start(){
        this.run();
    }
}
interface TTT{
      void run();
}